Pump jack



Juiy l 1924.. 7 1,500,059

G. COWETTE PUMP JACK Filed Sept. 6, 1923 11 ml m.

2 Sheets-Sheet l G. COWETTE July 1 PUMP JACK Filed Sept. 6, 1923 2 Sheets-Shes 3 Patented July 1, 1924.

UNITED STATES P A T GEORGE oowE'r'rE, o'E RoeERs, MINNESOTA, AssIeNoR E ONE-HALF TO MICHAEL :BORGK, or RoGERs, MINNESOTA.

PUMP JACK.

Application filed September 6, 1923, Serial No, 681,316. 2

To all whom it may concern;

Be it known that I, GEORGE CoWE'r'rE, a citizen of United States, residing at Rogers, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Pump Jacks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to 1 which it apperta'ins to make and use the same,

My invention relates to improvements in pump jacks and more particularly to those used in connection with oil well pumps, one

object of the invention being to provide a portable jack which may be easily drawn from one well to another and quickly hooked on to the pump, the power for operating the jack being carried by the same portable frame upon which the jack is mounted.

In constructing the device, a horizontal lever is fulcrumed'upon a hanger which extends downwardly from one end of the portable frame, and a further object is to construct said lever and hanger in a simple and inexpensive manner, without sacrificing any strength or durability.

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawings.

Figures 1 and 2 are a top plan view and a side elevation, respectively.

Figure 3 is an enlarged longitudinal section through the rear end of the machine.

Figure 4 is a perspective view of the oscillatory lever, the hanger therefor and two of the pitmen.

In the drawings above briefly described, the numeral 1 designates a horizontally elongated frame mounted on front and rear wheels 2 and 3, said frame including a pair of spaced parallel longitudinal beams 1. 415 The front end of the wheeled frame is provided with a tongue 5 or other suitable draft device, and an internal combustion engine or other prime mover 6 is mounted on said front end of the frame. A hanger 7 extends 50 downwardly from the other end of the frame '1 and is preferably formed of a single metal bar bent into substantially U-shape, with its arms 8 disposed between the beams 4; and nt u ard y at their pp ends s indicated at 9, to rest upon the upper edges of said beams, said ends 9 being secured to the beams by bolts or thelike 10.

A horizontal lever 11 is fulcrumed between its ends at 12, to the lower end of the hanger 7, said lever preferably consisting of two metal bars 13 whose intermediate portions are secured against each other by rivets or the like 14 and positioned in the lower end of the aforesaid hanger. The rear ends of the bar 13 are bent outwardly away from each other and then extended in parallel relation as indicated in 15, and a pair of vertical pitmen 16 arepivoted at their lower ends to said bar ends 15, the upper ends of said pitmen being connected by a transverse bar 17 having a suitable clamp 18 for connecting it with a pump rod.

The front or inner ends of the bars 13 are bent laterally outward as indicated in 19 and then extended in parallel relation as shown at 20, and a pair of upright pitmen rods 21 are pivoted at their lower ends to the ends 20. The upper ends of the pitmen 21 are connected by wrist pins 22 with a pair of large gears 23 on the ends of the transverse shaft 24 carried by the frame 1, said gears 23 being driven by a pair of pinions 25 on a second transverse shaft 26. the latter being driven by the motor or the like 6, through any suitable driving connections,

such as belt 27 and pulleys 28 and 29. Obviously a suitable clutch may be provided to stop and start the gearing at will.

By providing the construction shown and described or a substantial equivalent thereof, a machine is produced which may be readily drawn from place to place and quickly connected with a pump, for operating the same, it being obvious that rotation of the gear wheels 23 will cause vertical oscillation of the lever 15 which, through the instrumentality of the pitmen 16, will reciprocate the pump rod.

As excellent results have been obtained from the details disclosed, they are preferably followed, but within the scope. of the invention as claimed, numerous minor changes may be made,

I claim 1. A pump jack comprising an elevated frame having two parallel side beams, a one-piece substantially U-shaped hanger whose arms are disposed between said beams iscaesa at one end of the frame, the upper ends of said arms being directed horizontally outward and secured to the upper sides of said beams, a horizontal lever whose intermediate portion is received and fulcrumed in the lower end of said hanger, a pitman pivoted to and extending upwardly from one end of the lever for connection with a pump, another pitman connected to the other end of said lever and rising therefrom, and means mounted on the frame for reciprocating said other pitman.

2. A pump jack comprising an elevated frame, a hanger extending downwardly from one end thereof, a horizontal lever beneath the frame fulcrumed between its ends on said hanger and having one end extended beyond the frame, said lever consisting of two metal bars having their intermediate portions secured against each other, the end portions of said bars being extended laterally away from each other and then disposed in spaced parallel relation, pairs of pitmen pivoted to the ends of said bars r and rising therefrom, means for connecting one pair of said pitmen to a pump, and

means on the frame for reciprocating the other pair of pitmen.

3. A pump jack comprising an elevated frame having two parallel side beams, a one-piece substantially U-shaped hanger whose arms are disposed between said beams at one end of the frame, the upper ends of said arms being directed horizontally out-- ward and secured to the upper sides of said beams, a horizontal lever whose intermediate portion is received and fulorumed in the lower end of said hanger, said lever consisting of two metal bars having their intermediate portions secured against each other, the end portions of said bars being extended laterally away from each other and then disposed in spaced parallel relation, pairs of pitmen pivoted to the ends of said bars and rising therefrom, means for connecting one pair of said pitmen to a pump, and means on the frame for reciprocating the other pair of pitmen.

In testimony whereof I have hereunto at fixed my signature.

GEORGE COVVETTE. 

